Improvement in harrows



J. DAWSON. Improvement in Harrows.

"Patented M 12. 1872.,

mvmmaz PATENT JAMES DAWSON, OF GREENWOOD, ILLINOIS.

lMPROVEMENT IN HARROWS.

Specification describing a certain Improvement in Harrows, invented byJAMES DAW- soN, of Greenwood, in the county of McHenry and State ofIllinois.

This invention is an improvement on that for which Letters Patent weregranted me bearing date October 25, 1870, said improvement relating tothe harrow and also to the joints of the frame.

'In the said patent it is set forth that the beams composing the frameof the harrow are jointed together at those extremities which form theside corners of the harrow, the end of one beam entering the spacebetween forks formed on the extremity of the other, and in one piecewith it.

The present invention relates to the, construction of the said-forks inseparate pieces, which are riveted to the end of the beam instead ofbeing formed solid with it.

Figure 1 is a plan view, and Fig. 2 is a perspective of one of thecorners D.

A B are the beams composing the frame of the harrow, which, togetherwith the swivels and the hooks to and chain 11, are fully described inmy above-mentioned patent. O is the evener aforesaid, the same beingconnected at its middle by a link, a, to the front hook at, and also atits ends by chains d to hooks e, secured to the middles of the front setof beams A B. This arrangement prevents the harrow from sluing to theextent to which it is liable when the horses are connected only with thehook a. The shanks of the hooks e are placed at right angles to thebeams A B, and are secured beneath said beams by means of bolts passingeach side of the beam and through plates 0 placed across the upper sidesof the beams; the hooks e themselves are bent at such an angle withtheir shanks as to be parallel with the line of draft. This constructionrenders it easier to tilt either side of the harrow than as though thehooks e stood at right angles with the beams. The teeth f are keyed inplace, the key-seats being punched at the same time as the holes for theteeth. The latter are upset at their heads so as not to drop through theholes if the keys become displaced. At the side corners D of the harrowboxes h inclose the ends of one of the beams A and one of the beams B,and are riveted to these beams; said boxes having at their outer.

ends forks h, between which are jointed the extremities of the otherbeams A B.

The advantage of this construction is that, should the forks h break,the box It, in which the fracture occurs, can be removed and anothersubstituted with little loss of time compared with the delay oaused byrepairing a broken fork that is made in one piece with the beam, as inmy original machine.

I claim as my invention The combination, with the beams A B, of theforked boxes h, as described. 7

- JAMES DAWSON. Witnesses:

WILLIAM WILSON, SAMUEL WILsoN.

